Gromov-Witten invariants of ${\text{bp}}^1$ and Eynard-Orantin invariants

We prove that stationary Gromov-Witten invariants of ${\text{bp}}^1$ arise as the Eynard-Orantin invariants of the spectral curve $x=z+1\mathrm{/}z$, $y=\ln z$. As an application we show that tautological intersection numbers on the moduli space of curves arise in the asymptotics of large degree Gromov-Witten invariants of ${\text{bp}}^1$.